Science4All (english)'s video: Can you glue opposite edges of a square Relativity 7

This is a conundrum that many of the greatest mathematicians couldn't figure out. While John Nash did answer yes - by proving the wonderful Nash isometric embedding theorems - he couldn't say how. After 160 years of research, the Hévéa project finally did it! And it is spectacularly beautiful! Hévéa Project: http://hevea.imag.fr The Tortuous Geometry of the Flat Torus | Science4All Article http://www.science4all.org/le-nguyen-hoang/flat-torus/ Why do soccer balls have the shape they have? Platonic solids | Science4All 8 https://www.youtube.com/watch?v=JfkYeZqpHVg What's Einstein's gravity? General relativity explained! Science4All 15 https://www.youtube.com/watch?v=zZDoSpiIxs0 Could space be finite? Poincare conjecture | Science4All 21 https://www.youtube.com/watch?v=dNQuzmA42vw